sorting in the same field

hi,
i have a small problem first i am giving the table here,

Depart Model Status
EADL 070-678-k-rghjk1 Ok
EADL 070-678-k-rghjk2 Ok
EADL 070-678-k-rghjk3 NOk
EADL 070-678-k-rghjk4 NOk
EADL 070-678-k-rghjk5 NOk
EADL 070-678-k-rghjk6 Ok
EPD 0570-4598-r-fsdagdas1 Ok
EPD 0570-4598-r-fsdagdas2 Ok
this is the table with department, model and status fields
in a deparment there are some model checks as 070-678-k-rghjk, the last didgit is the version nr, if the check is tested on the same day on same dept the model name just changes the name with just version nr as 1,2,3,4,5´,6 ....
i want a query such that the output result should be the model with highest version
the result of the above table come as
EADL 070-678-k-rghjk6 Ok
EPD 0570-4598-r-fsdagdas2 Ok[/COLOR]